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Message-ID: <20140622084507.GB13974@gmail.com>
Date: Sun, 22 Jun 2014 10:45:07 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: LKML <linux-kernel@...r.kernel.org>,
Steven Rostedt <rostedt@...dmis.org>,
Peter Zijlstra <peterz@...radead.org>
Subject: Re: [patch V4 00/10] rtmutex: Code clarification and optimization
* Thomas Gleixner <tglx@...utronix.de> wrote:
> Hopefully the last iteration of this.
>
> I addressed all the review comments and added the following new ones:
>
> 1/n: plug unlock race.
>
> Patch was separately posted already in the safety of
> *mutex_unlock() thread.
>
> 2/n: Document and simplify the trylock path
>
> 3/n: Document and simplify try_to_take_rtmutex()
JFYI, the Blackfin cross-build fails with:
/home/mingo/tip/kernel/locking/rtmutex.c: In function 'rt_mutex_adjust_prio_chain':
/home/mingo/tip/kernel/locking/rtmutex.c:739: error: unable to find a register to spill in class 'CCREGS'
/home/mingo/tip/kernel/locking/rtmutex.c:739: error: this is the insn:
(insn 82 75 107 2 /home/mingo/tip/kernel/locking/rtmutex.c:487 (set
(reg:BI 186)
(eq:BI (reg/v/f:SI 9 P1 [orig:85 top_waiter ] [85])
(const_int 0 [0x0]))) 111 {compare_eq} (nil))
/home/mingo/tip/kernel/locking/rtmutex.c:739: confused by earlier errors, bailing out
Thanks,
Ingo
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